Attachment for grain purifiers



Minh-2, 1929- T. A. McwlLLlAMs ET AL 1,706,800

ATTACHMENT .'FOR GRAIN PUR-IFIERS Filed Nov. 17, 1925 m A NvENToRATTORNEYS Patented Mar. 26, 1929.'.

. UNITED f ST THOMAS a.y MCWILLI'AMsoMER c; PAnMAN`,-AND ALBERT n.OVERALL, or Nas-n; y vILLiaKTENNEssEE,v AssIeNoRsTo F. 1v1. nanars, orNASHVILLE, TEIfmEssEJi.'`

s ATTACHMENT ron GRAIN PURIFIEES? v.ppncatnmy inea' Novenlber 17,1925;semi No. 69,683.

g' Our vpresent invention relates generally to*v puriiiers-as used 11iflour mills and the likev 'for withdrawing specks' andv y variousiorms'v ofV impurities from grain, that is middlings andthe like, andour inventionhasfpforitsv primary object'the-provision,v osta suctionpurilierwhich maysbjereadily and Veasily adapted 'and installed inlconnection with va` 'rious forms and sizesfot` grain purifiers of'.thatnature infwhich the grain 1scarriedY through from the rollsuponacloth `apron.

A further objectof your"` inve ntionj is the provision of 'an attachmentwhich maybe y adapted ,as above described, and which lwill eiiectivelyand'eiiieiently operate to' with draw impurities flrom grain [withtheleast possibleloss vof grain orf-useful 'portion Vof thestoclrthrough the attachment tothe ldust VVcol-,V`

y lector.

1n the .accompanying drawing -which illus'- trates our presentinventlonand forms apart of this specification,

Figure 1 is'aside view, partlyf'in elevation and vpartly in'. sectionillustrating' the" practical application ofour invention,

Figure 2 is a front elevation thereof, and

Figurev 3 is an enlarged deta'iltransverse 'l section taken throughlofurimproved attach- .ment substantially on the line 3,-43 of Fig-y urel. 4,Referring now to these figures,-and particularly to Figures 1 and 2 lWehave shown' in a general way at 10 a-eonventijonal grain p'urilierofthat typewhereinthe-grain passes throughl upon a cloth apron' 11,there being usually a considerable space 12 kbetween'such cloth apronandthe top 13 vofthe casing or cabinet of the purifier. Y

Our improved attachment essentially 1ncludes a series of downwardlylarfing'and" downwardly opening suction hoods 14,*preferably arrangedwiththeir adjacent edges in contacting relation so as to coversubstantially the entire area of the apron,- and ary ranged in numbertherefore depending to a considerable extent upon the size of the puriliier or rather the apron 11 `within the purifier.

above which the hoodsare disposed.` y

p kkEach 'of the hoods is in open communication with an upstanding tube15 attached thereto, r andthe upper portion of each tubel is disl posedintelescoping adjustable relation within the,y lower open end of atubularv hood sup- .tion hoods 14.

"a suction line 17, the latter communicating at one end with ak iancasing 18 vhaving therein a fanl) and discharging throughan.-outletpipe'20 into a suitable dust' collector Vas in ordinary-practice.vThe suctionline 17 may, p

as shown, be inthe form'` of anenlarged pipe havingv at its endoppositelthe fan casing 1 8 series of apertures 21 withwhich van aper-v turedvalve member 2:2` telescoping'the' re-4 spective y e'ridsl fof the pipe,cooperates'.vv The turning of ythis valve meinberto more or lessregisterits apertures with theapertures 21 of the," suction pie, controls thesuctionr through the severa tubular hood supports 16'.4 Moreover, eachhood supportr 16yhas an opening23 therein,l and a collar 24 sur-7vrounding:the 'same with an opening'25 to more or less register with theopening 23,'

so that while thevalve member 22 simultanenously :controlssuction in theseveral tubular hood supporta-the rotating va'lvecollars 24,ycoperating,with the openings 23 individually control suction throughthe several suc-y l Inthisway desired delicate control may be y sov ihad throughout the seriesoflsuction hoods,l

varying'trom relatively strong suction at vthe loutgoingl side of thepurifierv to a ycom-y paratively weak suction at the incoming side'.` fBy virtue ofthe telescoping adjustment of'v the several upstandingvtubes'16, the -hoodsllll may be raised and Aloweredlso as to rcontrol andregulate the space between the hoods yand the grain carryingapronllwithin the Vvpurilier and permit the lower open ends. of the'vhoods to be positioned closely adjacent to the apron isnecessary insuccessfully purifying middlings andthe like, where it is of primaryimportance to withdraw'the impurities apron.k s.

Our improvedy attachment may be readily and easily installed as isquiter obvious, and 71 will ei'leetively' and refficiently operate in 'Ywith as little ofthe loulaspossible. Figures y' l 1 and 3 show the closerelation ofthe hood- :mouths to the 'apron so -thateach Vhood indi- 10oy vidually' draws air upwardlythrough ther i practice to withdrawvarious impurities `from the grain with a minimun'i loss of the grainitself.

That we claim is:

l. In a grain purilier, a suction pipe, a plurality of tubular membersdepending -from and in communication with the said suction pipe, aplurality of downwardly flaring suction hoods opening downwardly inclose proximity to said screen cloth and, each having an upstanding tubetelescoping and adjustable in one ol' the said tubular hood supports, aregulable air valve in the intake end of the suction pipe to control thesuction conimunicated to said tubular hood supports, each of saidtubularhood suppoits having an opening, and an apertured collar around each ofthe tubular hood supports, coacting with the opening thereof to form anair valve for individually controlling y,the .suction through therespective vhoods supported thereby.v

2. An attachment for grain puriiiers, ineluding` a series of downwardlyflaring and downwardly opening suction hoods, a suc-- tion pipe having aplurality of tubular connecting members extending over said pipe atspaced points there along said hoods having means adjustably engagingsaid connecting members and adapted when in connection therewith'to lieclosely adjacent to one another, van air controlling valve in thesuction pipe, andv an independently controlled regulable air valve ineach of said tubular connections cooperable with the suction pipe andvalve.

3. An attachment for grain puriiers of the type employing a horizontalscreen cloth, said attachment comprising a suction chamber and suctionmeans therein. and adapted for attachment at one end of the purifier, asuction pi pe extending from said. chamber over said screen cloth, aseries of tubular supports extending downwardly from the suction tube, aseries of downwardly Haring and opening suction hoods telescopicallyadjustable in said tubular supports and disposed in close proxiinity tothe screen of the purifier, a variable Y air valve at the end oi thesuction pipe remote from the suction means, and a variable air valve ineach of said tubular hood supports, as and for the purpose described.

4. An attachment for puritiers and a cloth from thc suction means end tothe variable valve ineans,and a plurality of tubular supports extendingdownwardly from said suction tube and disposed intermediate its'ends,

a plurality of downwardly flaring and openino suction hoods adjustablymounted on said ltubular supports, a variable sleeve airvalve at theintake end of the suction pipe, each'` of said tubular supportsv havinga transverse aperture therein, a perforated sleeve on said tubularsupports adapted to control said apertures, said apertures actingconjointly with the terminal air valve nie-ansof 'the' suction tube',whereby to regulate vthe'suetion in each hood independently of theothers.

5. An attachment ior grain puriiiers adapted to be secured to thepuriiier lat one end, and inclu ding a suction means 2so secured,avsuction pipe projecting from said suction means and extending over thepurifier, a se- .ries of tubular supports opening out at opposite sidesof said suctionpipe in pairs eX- tending downwardly, suction hoodscomprising` pipesand downwardly flaring and opening ends adapted to beclosely adjacent,a variable air valve on said suction pipe, and variableair valves in said tubular supports adapted tocooperate with the airvalve ot the suction pipe and with each other, wherebyv to regulate thesuction in each of the hoods.

onen e. PARMAN. Y ALBERT n. OVERALL.

'riioMAs A. Mewiicigiinaps y.

